Locking-nut.



A. V. BRYCE. LOOKING NUT.

APPLICATION FILED SEPT. 16, 1907.

PATENTED AUG. 18,1908.

UNITED STATES PATENT oEEroE.

ANDREW V. BRYCE, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO INTER-STATEMANU- FACTURING COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OFARIZONA TERRITORY.

LOCKING-NUT To all whom it may concern:

Be it known .that I, ANDREW V. BRYCE, a citizen of the United States,residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inLooking- Nuts, of which the following is a specification, referencebeing had therein to the accompanying drawing.

My invention consists of an improvement in looking nuts for bolts, etc.of that class wherein a turning nut is provided with an internalthreaded bushing adapted to engage the bolt under turning action of thenut and to gradually tighten upon it so as to prevent its loosening.

The invention has for its object to provide a device of this characterwhich shall be simple and eflicient in construction, cheap tomanufacture, so constructed that the nut and contained bushing may beassembled and maintained in operative relation to each other withoutseparation during shipment or handling, andgenerally adapted to tightlyhold a bolt without danger of loosening, as shall be more fullyhereinafter described.

Referring to the drawings :Figures 1 and are views in side elevation ofthe device employing a hexagon nut. Fig. 3. is a vertical sectional viewon the line III. III. of Fig. 4:. Fig. 4. is a plan view of Fig. 1. Fig.5. is a plan view of the nut, the bushing hav ing been removed. Fig. 6.is a sectional view on the line VI. VI. of Fig. 5. Figs. 7 and 8 areexterior and interior plan views of the bushing blank. Fig. 9. is an endview of the bushing blank, its assembled form being indicated in dottedlines. Figs. 10 and 11 are views in side elevation of the device as usedwith a flanged nut. Fig. 12. is a plan view of said figures. Fig. 13. isa cross sectional view showing a modified construction of nut. Fig. 14.is a perspective detail view of the bushing of said nut, provided withengaging elements adapted to prevent rotation. Fig. 15. is a verticalsectional detail view on the line XV. XV. of Fig. 4, illustrating amodified construction.

Referring to the drawings, 2 is a turning nut of any suitable outsideform, either square or hexagon, the interior of which is provided withconcentric downwardly nar- Specification of Letters Patent.

Application filed September 16, 1907.

Patented Aug. 18, 1908.

Serial No. 393,070.

I rowing tapered walls 2 as shown in Fig. 6 adapted to receive theinteriorbushing 4 as shown in Fig. 3. The upper face of nut 2- isprovided with upwardly extending lugs or lips 5 having thin terminaledges 6 adapted to engage the corresponding straight or flat edges 7 ofthe top portion of bushing 4 and to be bent over thereon to securelyengage said bushing and positively prevent its disengagement from thenut 2, whereby the'bushing and nut will thus constantly maintain theirrelative position. For the purpose of insuring holding engagementbetween lips 6 and the bushing, it is preferably provided with narrowlaterally extending flanges or beads forced, as clearly shown in thedrawings.

In Figs. 7, 8 and 9 I illustrate my preferred form of bushing, forfacility of manufacture, whereby the interior threads 9 may be cast,thus greatly cheapening the operation.

The bushing as shown is cast in two halves 4 45', approximately semicylindrical as to their body portion and joined by a thin web of metal10, the enlarged head of the bushing having the flat sides 7 as stated,so that when inserted in position in the nut it may be readily turnedthereby, upon turning the nut with a wrench. The bushing blank shown insaid figures is bent around upon itself, the connecting bridge 10maintaining its integral connection or being fractured in the operationwithout effecting its assemblage with the .nut, whereupon the bushing isinserted downwardly into the nut cavity as clearly shown in thedrawings, particularly Fig. 8. It will be noted that the taperingannular exterior faces of the bushing correspond with the taperingannular exterior faces 3 of the nut, whereby a neat binding fit isinsured.

In applying the device, the bushing is screwed downwardly upon a bolt asshown in Fig. 1 until the nut 2 blnds against any meeting surface 11, asfor instance the face of a under face of nut 2 makes contact, furtherturning will cause the bushing to feed upon the bolt threads, tending todraw it inwardly within the tapered nut .socket. The result of suchoperation is that the sides of the bushing will be forced together,owing to 8, over which the lips 6 may be readily fish bar in making arail joint, and when the clearance spacei2 between-the meeting edges,until the nut has been turned to the desired tension, whereupon thebushing. will firmly grasp the bolt, and at the same time hold the nutin its seated position.

As thus assembled the complete device will act as a nut, securelyholding any arts together by means of the bolt, and isengagement orlooseness will be absolutely prevented. Should forany reason thepartsbecome loose they may be readily adjusted by merely turning the nut totake up wear.

In Figs. 10, 11 and 12 I have shown the nut 2 as provided at its bottomportion with an integral washer 13, adapting it for special use, as foraxles, etc.

By reason of the construction of the device in eitherform, it will benoted that the nut may be screwed against a permanent bearing, oragainst a temporary abutment for the purpose ofcausing the bindingaction of the ushing upon the bolt, thus positively holding the nut inany desired position.

In Fig. 13 I have shown a special form of nut 2 having in its interiorthe tapered faces 3 with a series of recesses 14 and interveninginwardly extending thin lips 15. The bushing 4 for such form of nut isprovided with corresponding tapered exterior faces andlaterallyprojecting lugs 16 with intervening recesses 17, adapted to engage therecesses 14 and lips 15 respectively. The function of the recesses 14and'projections 16 is to prevent rotation of the bushing relative to thenut, and of the lips 15 and recesses 17 to cause binding action toprevent withdrawal of the bushing, thus insuring continued assemblage ofthe arts. The bushing. is divided as indicate at 12 at one side toprovide ample clearance for contraction.

In Fig. 15 I have further illustrated the interior construction of thedevice, in section, showing the bushing 4 inserted within thesurrounding nut 2, the under sides of the lateral projections 4" of thebushing being sloped somewhat'downwardly as indicated at 18, while thecorresponding upper faces of nut 2 are also sloped downwardly to agreater degree as indicated at 19. The resulting ef fect of suchconstruction is that when the outer edges of the bushing flanges makecontact with the outer edges of the nut 2-, an inwardly widening space20 is provided, giving clearance, so that the contacting edges of thebushing and nut forming a fulcrum bearing, the inwardly pinching orgrasping effect of the bushing will be greatly increased, thusmaterially increasing its holding power.

, With either form of construction the complete device constitutes astrong, efficient and durable locking nut having great strength andcontinuous holding power. It may be used in various adaptations and maybe changed or varied in different details of construction or design orin other features by allel holding faces at one end a extending at eachside of the areto be considered as Within the scope of the followingclaims.

What I claim is 1. A locking nut consistingof an outer'nut having acontinuous annular interior tapered cavity and oppositely locatedprojecting parallel'holding lugs havin thin terminal edges at its outerend, and a 'vided bushing having corresponding annular exterior taperedfaces and interior threads and (apposite parapted to be engaged by saidholding lugs, substantially as set forth.

2. A locking nut consisting of an outer nut having a continuous annularinterior tapered cavity and oppositely located projectingpar-jv allelholding lugs having thin terminal edges at its outer end, and a dividedbushing hav ing corresponding annular exterior tapered faces andinterior threads and opposite parallel shouldered holdin faces at oneend adapted to be engaged by said holding lugs, when inserted and bysaid terminal edges when bent over into engagement, substan tially asset forth.

3. The combination with an outer nut hav ing a continuous annulartapered interior, parallel bearing lugs projecting beyond one end, andintervening lug-bearing edges extending across the opposite outerportions of the nut; of a tapered divided bushing having .1

interior threads, corresponding annular exterior tapered faces, andoppositely arranged lugs at one end having parallel sides adapted tobearagainst the inner sides of the bearing lugs of the nut and upon saidbearing edges,

substantially as set forth.

4. In a locking nut, the combinationof a nut having an inwardly anddownwardly sloping up er face and a smooth tapered interior, an adivided bushing having laterally projecting flanges taperedinwardly anddownwardly to a lessdegree and also having a smooth exterior andinterior threads for engagement with the bolt, with means for assemblingthe nutand bushing to prevent relative rotation set forth.

5. A bushing consisting of semi-cylindrical halves having smooth annularexterior faces and interior threads, joined at one end'bya thin integralconnecting bridge, and provided at the same end with flat turningshoulders, substantially as set forth.

6. A bushing consisting of semi-cylin of either, substantially as dricalcast metal halves having smooth an.'

nular exterior faces and interior threads, joined at one end by a thinintegral connecting bridge and provided at the same end with oppositelyarranged flat turning shoulders bridge and of the endsof the bushingrespec- .tively, substantially as set forth.

' connecting a continuous annular smooth tapered inteand to occupy saidrecesses, substantially as 10 I rior and oppositely arranged parallelproset forth.

jecting holding lugs and intervening oppo- I In testimony whereof Iaffix my signature sitely arranlged ll'lelcesges1 at) itshouter end, andin presence of two Witnesses.

an interna t ea c us in consistin of semi-cylin drical exteriorlytafiered halve ANDREW BRYCE havin parallel outer bearing faces and op-Witnesses: posite y projecting lugs at their outer ends GEO. B. BLEMING,adapted to engage the holding lugs of the nut O. M. CLARKE.

